What is SS321 stainless steel?

SS321 is a type of stainless steel that includes titanium. This addition helps prevent carbide precipitation at high temperatures, making it more resistant to corrosion and cracking in demanding exhaust applications.

What does '1D radius' mean for this elbow?

A 1D radius means the center of the bend is one times the pipe's diameter away from the edge of the pipe. For this 4-inch pipe, it creates a relatively tight bend, useful for fitting into tight spaces in custom exhaust systems.

Why is mandrel bending important for exhaust tubing?

Mandrel bending uses a support tool inside the pipe to prevent the walls from collapsing or kinking during the bending process. This maintains the pipe's internal diameter and smooth airflow, which is crucial for exhaust system performance.

Specifications

Brand: Stainless Bros
Part #: 701-10256-4100
UPC: 701-10256-4100

Stainless Bros 4in SS321 90 Deg Mandrel Bend Elbow - 1D Radius 16GA/.065in Wall (Leg)

Name: Stainless Bros 4in SS321 90 Deg Mandrel Bend Elbow - 1D Radius 16GA/.065in Wall (Leg)
Brand: Stainless Bros
SKU: stainless-bros-stainless-bros-4in-ss321-90-deg-mandrel-bend-elbow-1d-radius-16ga-t14-548493
Price: 107.51 USD
Availability: BackOrder

$107.51

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Stainless Bros 4in SS321 90 degree mandrel bend elbow with a 1D radius. Ideal for custom exhaust fabrication.

Key Features

Made from SS321 stainless steel for high-temperature resistance.
Features a 1D radius for a tight, smooth bend.
Mandrel bent to maintain consistent pipe diameter and prevent wall collapse.
4-inch outer diameter.
16 gauge wall thickness (.065 inches).
Designed for custom exhaust fabrication and other high-heat applications.

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About this part

Product Details

This 4-inch diameter elbow from Stainless Bros is made from SS321 stainless steel, a material known for its strength and resistance to high temperatures, making it a solid choice for exhaust fabrication. The 1D radius means the bend is tight, with the center of the bend being one times the diameter of the pipe away from the pipe's edge. This tight radius is achieved through a mandrel bending process, which ensures the pipe walls don't collapse or wrinkle during the bend, maintaining consistent diameter and flow throughout the elbow.

With a 16-gauge wall thickness, or .065 inches, this tubing offers a good balance between durability and ease of welding for custom exhaust projects. Whether you're building a custom exhaust system, modifying an existing one, or working on another high-heat application, this SS321 mandrel bend elbow provides a reliable component for creating smooth transitions in your tubing runs.